#include "head.h"
#include <stdio.h>
int main()
{
       int a=8, b=2;
        printf("input two numbers:a=%d,b=%d\n",a,b);
scanf("%d%d",&a,&b);
	printf("add:%d\n",add(a,b));
	printf("sub:%d\n",sub(a,b));
	printf("mul:%d\n",mul(a,b));
	printf("div:%f\n",div(a,b));
        
	return 0;
}
